Work completed / marketplace case studies

Work that happened inside the account.

Marketplace launches, account recovery, catalogue transformation, paid growth, reporting infrastructure and owner-operated commerce. This is the work behind Northline — shown as commercial problems, actions taken and outcomes rather than a gallery of screenshots.

250K+Listings implemented on the largest catalogue engagement

41 → 93Amazon IDQ improvement on a long-term catalogue project

6x → 26xeBay advertising efficiency improvement on one optimisation engagement

Launch → handoverChannels built, proven and transferred to internal teams

Case studies

Seven different marketplace problems.

No two engagements prove the same thing. The portfolio spans catalogue scale, eBay launches, account recovery, multi-marketplace infrastructure, Amazon consolidation, international market entry and building a consumer brand with personal capital at risk.

01 / PAINTNUTS / AMAZON

From fragmented paint catalogue to marketplace built for scale.

Rebuilt a dormant Amazon catalogue, implemented the automotive paint-pen and aerosol architecture, launched PaintNuts Home, created mass Excel and Photoshop production workflows, built SEO and A+ Content, and managed catalogue quality and compliance across more than 250,000 listings.

COMMERCIAL RESULT CONFIRMED BY HISTORIC MANAGEMENT

AMAZON 250K+ LISTINGS AUTOMOTIVE PAINTNUTS HOME SEO A+ CONTENT IDQ COMPLIANCE

ANNUAL AMAZON SALES +94%

Increase in annual Amazon sales revenue comparing 2024 with 2022.

CATALOGUE SCALE 250K+

Listings implemented across automotive and Home catalogue expansion.

DATA QUALITY 41 → 93

Amazon IDQ improved substantially over the engagement.

MONTHLY SCALE 6-FIGURE+

Amazon monthly sales value reached six-figure territory during the developed period.

SEE HOW THE PAINTNUTS AMAZON CATALOGUE WAS BUILT →

02 / SALON BARGAINS

eBay channel launch.

A new eBay hair-colour channel built from zero, with catalogue implementation, search optimisation, promoted activity and ongoing commercial management through its first year.

EBAYCHANNEL LAUNCHSEOPROMOTED LISTINGS

LAUNCH0 → live

Channel built from a standing start.

ADVERTISING20x ROAS

Highly efficient paid marketplace activity.

ACOS5%

Low advertising cost relative to attributed sales.

YEAR ONEStrong growth

Meaningful first-year channel revenue established.

VIEW SALON BARGAINS CASE STUDY→

03 / RECYCLE IT CIC

Account recovery and operating repair.

A below-standard eBay account recovered through major inventory cleanup, customer-communication improvements, seller-performance work, restored advertising and a Shopify backend strategy designed to make the wider operation more scalable.

EBAYACCOUNT HEALTHINVENTORYADSSHOPIFY

RECOVERY8 weeks

Return to a healthier operating position.

PENALTY~6% removed

Additional seller-performance charge eliminated after recovery.

ADVERTISINGRestored

Ads became available again once seller performance recovered.

ENGAGEMENTCTR + CVR ↑

Impressions, click-through and conversion improved.

VIEW RECYCLE IT CASE STUDY→

04 / COMPLETE CARE SHOP

Multi-marketplace launch infrastructure.

Amazon, eBay and B&Q launch foundations built in parallel, including product selection, marketplace pricing, fulfilment and returns planning, and a BI dashboard designed to give commercial visibility from day one.

AMAZONEBAYB&QBIPRICING

CHANNELS3

Amazon, eBay and B&Q prepared in parallel.

LAUNCH RANGE20 listings

Controlled initial launch catalogue across products and variations.

REPORTINGBI built

Pricing, margin, ads, returns and profitability logic.

READINESSBefore launch

Reporting and operating processes designed ahead of go-live.

VIEW COMPLETE CARE SHOP CASE STUDY→

05 / GARDEN & HOME TRADING CENTRE

Amazon consolidation and eBay optimisation.

A four-month engagement simplifying a fragmented Amazon setup, solving carrier-routing constraints, improving paid efficiency, growing eBay and rebuilding the Leagrams marketplace presentation.

AMAZONEBAYPPCAPIA+ CONTENT

AMAZON SALES~67% ↑

Approximate daily sales growth following consolidation.

AMAZON ADS15x ROAS

Paid efficiency following the new structure.

EBAY SALES~4x

Approximate daily sales growth over the engagement.

EBAY ADS6x → 26x

Advertising efficiency improved substantially.

VIEW GARDEN & HOME CASE STUDY→

06 / O&M UK

International brand → Amazon UK.

O&M already had the brand, product range, photography, video and content. The work was to assemble the Amazon UK operation: onboarding, account creation, catalogue implementation, commercial modelling, advertising and team handover.

AMAZON UKLAUNCHCATALOGUEPPCTRAINING

MARKET ENTRY0 → live

UK Amazon operation created from launch.

ADVERTISING10x ROAS

Efficient paid activity during the launch phase.

EARLY TRACTIONStrong 90-day start

Meaningful gross sales generated in the first three months.

HANDOVERTeam trained

Internal ownership established after launch.

VIEW O&M UK CASE STUDY→

07 / FEATHER & FUR

Owner-operated marketplace brand.

A natural dog-treat brand built from zero across Amazon, eBay, Shopify and offline selling. Sourcing, branding, catalogue, PPC, fulfilment, SEO, packaging and customer acquisition were handled directly with personal capital at risk.

AMAZONEBAYSHOPIFYPPCBRAND BUILD

CHANNELSOnline + offline

Amazon, eBay, Shopify and physical selling.

ADVERTISING7x ROAS

Overall marketplace return across Amazon and eBay.

TRACTIONFive-figure gross

Real commercial sales generated from a self-funded launch.

DECISIONDeliberate exit

The brand sold; the return on time and capital did not justify further scaling.

VIEW FEATHER & FUR CASE STUDY→

Evidence & confidentiality: public-facing case studies should use approved screenshots, anonymised data or percentage-based performance summaries where commercial figures are sensitive. Explicit monetary values are intentionally omitted from this overview.

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