UST wheel needed

looking for advise on purchasing a new 26" back wheel, looking for tubeless for XC racing, don't want to spend a fortune. Any info appreciated.
Does it have to be UST? Cheapest way to go tubeless is Joes or Stans, if it has to be UST then people are often selling second 819's which are pretty bombproof. If you can go new then try OC tuning for some sexy ZTR Crests.