I don't know about others but I definitely know I really appreciate having all the previous data, even if it just knowing that XX months ago when it was put up for auction it passed in - that's important to know.
For example if a domain I had listed in the catalogue for $1000 that didn't even get a bid previously then if I get an offer 3 months later of $250 via the catalogue. I'd reflect on the fact that it didn't even get a bid previously and have to seriously reconsider if $1000 is realistic and I might end up taking the $250 offer despite me originally expecting more.
So at the end of the day being able to refer back to the past results is a big deal for me.
If you want to make it less cluttered maybe you guys could look into making it searchable, or sortable, ie able to order the results by outcome, or price achieved, alphabetically, etc.