I built this today for shooting my new wicked ridge warrior crossbow. By no means original to me.
2 10 ft, 2" schedule 40 pvc cut into 4 2ft pcs, 2- 3.5ft pieces for uprights and 1- 3ft piece for crossbar. Two T's and 2 elbows plus hdwe., I think it was around $37.00 total. Works great, holds target well with no sag and you can leave the crossbar unglued for easy takedown, in fact I left mine all unglued and it was no problem. In case you are wondering the hardware in the center of the crossbar is for when I get my Rinehart 18-1 target for broadheads.