if it has to be under $1000, I'll get the 200mm/f2,8L and any rebel body, new, refurbished, used, whatever. as long as it fits in your budget and I'll shoot indoor hockey game with f2.8 and ISO800-1600, I think you will get good enough result to sell.
refurbished rebel XS with kit lens sells for $429(http://www.adorama.com/ICADRXSKBR.html?searchinfo=refurbish)
200mm/f2.8L sells for about $750(http://www.adorama.com/CA20028AFU.html)
the prime 200mm/2.8L lens is the cheapest 200mm/2.8L, and rebels are slower than 40/50D, but still can do the job.
if you can really get close to the player, 40D/85mm1.8 combo will do the job well.
refurbished 40D sells for 699(http://www.adorama.com/CA20028AFU.html)