We have a 1460 that was built in 1981, can't remember what dad paid for it about 10 years ago but it was towards the top of the range, but it had several upgrades done to it by the previous owner. It just does corn and soybeans currently and has around 5200 hours and still runs good. If you are good about going through it before starting harvest every year you can prevent most of the breakdowns, ours is very dependable and if something breaks its pretty minor. (Mostly its something on one of the heads, the combine itself is very good.) Replaced most of the belts a couple years ago because they had cracks, some would have broken by now but I got them before they did.
Not sure about an 810 head, ours came with an 820 (flex) head that was the same age as the combine. Used it for several years but finally got a 1020 head, the old one was just plain wore out. Between that and the aftermarket concaves it increased soybean capacity quite a bit.