Quick and easy to make, and costs about $8
Very adaptable to different types of targets, and portable.
I used 2x4s, 1x4s, a bit of rope and screws. Boards that the targets staple to are 1x2s.
To build one stand you'll need two 17" pieces of 2x4, two 24" pieces of 2x4, one 13 3/4" piece of 1x4, screws and a bit of rope.
Basically you sandwich the piece of 1x4 between the 17" 2x4s.
Then you screw a 24" 2x4 on each end.
Then drill a couple holes for a rope handle, and you're done.
The 1x2s should slide into the stand easily.
If you accidentally shoot one in half, replacements are like $1.50