I've only got access to one bow at the moment... soon to be mine(when I leave), but it's my fathers for now.
compound bow he bought in his 20s(mid 70s) for $1500... Oak core, fiberglass outer slabs... 3 'strings' of cable... small metal rest for the nock, on the cable(about 1/8" thick)... currently set to 80lbs pull, 60% letoff, and I draw a 33".
annoying when the only arrows you have are custom made for yah. I pay $15/shaft... graphite shafts, 2 blade broadhead(fixed), and a pile of field point heads of the same weight as my broadheads. My local gun shop gets them for me(shafts and heads)
I head out every fall to a farmer's field(one of my father's old buddies) and shoot haybales from 60yards. I have my top sighting pin set at 100yards, though I've only started getting good at 80yards max.
considering that bow is about 30yrs old, and only the 2nd cbale(my father changed it in 96 when the draw-weight was reset for me), it's holding up well. only a couple minor scratches on the handle.
the only bad part about compound bows is the snapping against your arm. This bow is made to be held in your left, and use your right to draw(my father's bow, remember), and I do the opposite(my left is stronger)... had to get a leather guard made for me, only set me back $200.
full leather gauntlet, covers over my thumb and back of my hand, and goes back far enough that I can still bend my elbow confortably. Full lower arm is covered, just slips on(and gets hot when you shoot in +25c weather.
haven't seen any bows blow into pieces, but I've been told of one doing it. guy had it in his safe for 5yrs, then took it out of string it. It cracked when he had it 3/4 of the way.