Yes,I have that problem,and it pisses my wife off severely.I drag her out on a 3 hour drive to get to a knife shop for a knife I just can't live without and in a matter of weeks later I've sold it or traded it off.Sometimes I can really kick myself as I have regretted selling or trading some of my knives.I tend to loose much of the value when I sell or trade to make a quick turnover to generate funds for another purchase.I'm trying to stop from doing this from now on,within reason.If I had half of the knives I've sold or traded in the last 2 years I would have a collection most poeple would drool over.I'll list some of my knives I know longer have from my memory.Randall model 14,two model 15's,model 16,four Kurt Meerdink various sized Phase three fighters,two E.K. bowies,Dozier neck knife,Steve Corkum Kazuka,Bud Nealy Pesh K-besh (spelling?),Three Chris Reeves Sebenzas,Elishewitz folder with mokume bolsters,Speed-tech synergy,four Benchmade 710 axis locks,BM 720,three BM 42 and a BM42A bali-songs,Erickson custom balisong with desert iron wood inserts(the custom bali hurt the most),about five BM auto's,Micro-tech socom auto,brend UDT,halo 3,a few paragon auto's,MOd Trident,MOD hornet auto's,about twenty italian auto's,whitwolf pro,numerous other folders and fixed blades to painful to list,even a nice custom sword from Jim Hrisoulas
: oh well!