Scouts are cheaper than TK if you can sew. The armour itself is cheaper, since there is less of it, but if you can't sew you'll have to commission it which may well end up costing more than a cheaper TK-kit like ATA.
Scouts should ideally not be super clean, since the originals were quite weathered to match the Endor conditions, but they do get to troop with TK's just like any other 501st approved costume.