No hard and fast rules. For example, specialized strictly control promotions. Just find the best deal at the time you want to buy
Or buy used, eg there's a good looking Whyte Saxon Cross in London on gumtree right now
https://www.gumtree.com/p/bicycles/pedal-bike-whyte-saxon-cross-/1173880546
Obviously you'd check its provenance with receipts etc
I doubt you'll ever find the right bike more than 40 or 50% offI tend to take L/XL being 6'1" and 35" inside leg.
What about ex-demo bikes. What tends to be the biggest discount % within reason.
I doubt you'll ever find the right bike more than 40 or 50% off
@biggs682 have you still got that big Ridley. Might be of interest to @mstrmind5