Sellhelm is desktop software for eBay dropshippers in the UK and US. It works out what every listing should sell for after eBay's fees (final value, per-order, regulatory, plus VAT), then watches supplier shops for price rises and stock-outs before they cost you money - 70+ built in for UK, 30+ for US, and hundreds more checked by its free link checker. It also runs your order desk, VAT-ready books and five listing designs, on your own Windows PC. One payment from £99, no subscription.