Usually they give me an offer the day after I create the demand. Longest they have taken with me was probably 40 hours.So with Flubit how long has it taken you to get sent an offer? Is it near the end of the 48hour window?
I've asked for two things and got both offers around the same time the next day (so around 24 hours).
I used links from shopto for both and got:
1) Luigi's Mansion (posted earlier): £31.85 -> £27.93
2) Fire Emblem: £32.86 -> £28.23