Now I have a problem. I can't find the program in ITV player and can't quite remember the actual question. Whether it was which site actually sold an item first or which site was established first. According to Wikipedia Ebay was established in 1993, Ebay
As to Amazon Wikipedia shows this . Clearly stating 1994.
Now the couple won £125,000 as Amazon was the correct answer to the question. I suppose I'll have to either look for a repeat or try ITV player again at a later date.