do you specialize in anything

is there anything you specialize in?

like i can easily spot crap bieks from quality bikes, i can easily tell if a bike will take 15min or 15hours to get working again to resell for $50... and know if i could also get it to resell for $500
also im run across aquarium tanks and equipment as welll and can easily spot what will sell well on the CL

so yeah is there any kind of scrap you come across a lot and can turn around for great profits cuase you got a lot of knowledge on it.. certain type of electronics? antiques? car parts? cooking ware?



but yeah, the reason i bring this up was cuase i was dumpster diving and i found a huge stack of bike tires, like 30 of them... quality ones, had to be bout $30-$70 new each one but i was sure they were all gone bad... i inspected them, only a few had sidewall tears and even those could be repaired, most had bout 1-3 months of tread left on them... some even seemed new, wth???

but yeah, is there anything your good at spotting value of?