thats a legitamate question. looking at the ddmtuning's ones, there doesnt seem to be anything that screams 'dont buy me', if you like the price buy em.
i pay around $80 thru bajahid (an active member on this site, who it seems is allways willing to meet me at kartek here in LA. meeting up is allways nice, no shipping and you get them TODAY).
When i first bought in (ive bought like 5-6 kits from tony now, all the jeeps in the family have hid headlights, and some have hid aux's), tony was WAAAAAAAAAY cheaper than the competition, so yes, loyalty is one of the main reasons i buy thru him.
he's also amazingly connectable, you can pm him on naxja, and he usually hits you back really quick....