For me it was my one and only "big" unit that I purchased and took a huge bath on. Was a 10 x 20 or maybe even larger. Had doors on both ends, lights, etc. Had a nice radio, table saw, pipes, boards, bamboo dresser, another dresser, cool looking chest, etc. Was heavy on the "tools" and looked like a handyman unit. Silent bid auction. Didn't listen to my first gut instinct and upped my bid by $300. So I won the unit by $247 bucks or something like that. All of the cords were cut or frayed to ribbons. The large air compressor was bloth. The bamboo dresser was nice on the end facing the door. Other side was ripped at the top, and a cracked leg to boot. In all I took a $700 something bath. Didn't recover from that loss until late Jan of this year.
Other then that one big loss I've had a few break-even and $50-$100 loss units. Most of the time those are on what I call "gamble" trash units that may result in some nice finds or a few loads to the dump and are expected.