I do not know how Bioware arrived at this pricing but it could be adjusted to work as a credit sink.

1) the 3500 tech frag cost per piece seems a bit high. Maybe tech frags are going to be extremely easy to obtain but the price seems ludicrously high by 6.0 standards. Maybe this can be lowered to 1000 tech frags?

2) 500,000 credits is insanely low for the items on the vender. If you want this to become an effective credit sink you may want to increase the price to 1-2 million per piece of armor and 5 million per weapon.

Unless tech frags are going to be easy to obtain in 7.0, having the tech frag cost at 3500 effectively stops this vender from ever becoming an effective credit sink.

Players have hundreds of millions if not billions of credits but we are limited to 11,000 tech frags total and it is a lot harder to earn tech frags than credits.