Absolutely agree with this and I've mentioned this before. A visit to the likes of Gumtree produces pages upon pages of unwanted bikes. Practically spoilt for choice, and prices for complete bikes going lower and lower and making the price gap between new much bigger and bigger everyday.
A search on your all time favourite MBK brand
gives 6053 hits in the bike section, cheapest complete bikes are 0€ (give away) and the most expensive a MBK Kevlight TVT in pristine condition for 1000€ that keeps going through price reductions.
29 737 hits for "electric bike"