Guide books were the right tool for the 90s
CAP and Glass's have been the UK trade pricing standard for decades. Their model is the same: an editorial team analyses auction data, dealer reporting and market trends, then issues a monthly guide book of trade and retail prices.
The model worked when used car prices moved slowly. In 2026, a CAP/Glass's guide is anywhere from one day to four weeks out of date the moment it's issued. For trade decisions made today, that delay costs money.
How DealerPricing replaces the guide book
DealerPricing's pricing engine reads the entire UK live used car market every hour. Every valuation reflects current asking prices, recently achieved sold prices, current supply and current demand. When the market moves, the valuation moves with it.