I'm not sure about tarot heads but I'm sure others will chip in.
I got my copterx stuff from here....
http://www.ehirobo.com/shop/index.ph...ene4m8eckiuv00
Under the 450 V2 section is where you find the deal for the head and tail combo $29.99. Shipping can seem to take forever though, 4-5 days processing before shipping and 3-4 weeks for delivery in some cases, unless you pay top dollar for UPS.
IMO the copterx and exi stuff is fairly evenly matched in quality, and again I'm not sure about tarot. If anything I thought the EXI maybe better compared to copterx, as the swash looked like it had a slight advantage with the build quality.
So even if you get an EXI or CopterX head, you still may find slop in either. The advice in the stickies is to replace the sloppy balls and links with align originals, no matter if it's copterx or exi.