Has anyone bought from Peptronix Bio (PTB)?

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Was curious if anyone has any experience with this vendor. They've posted in the Vendor Connnections, which is where I found them.
 
The way I've looked at price/convenience with Uther is that, for example, I'm not seeing any testing groups on FPPG for WBS, so would one then have to try to gather a test group, along with the time/headache of organizing it. Many of the other China vendors seem to take a pretty long time shipping, add that time on top of trying to find testing.
I received my Uther order very quickly and there was already a testing group in place for what I ordered (MOTS-C), in addition to that he's been doing his own and they're coming in high and very consistent, and matching up with the 3rd party tests. Tirz 30 is $40 more than WBS, but a testing group would be at least that much per person, or much more individually, but we're talking $4 per vial more for Uther. SSA's Sema is $30 less than Uther, and from another person I know, they take a long time to ship.
Uther is right at double what I'm paying now. I understand though, that there are other factors that matter and that might justify at least some markup.
 
Uther is right at double what I'm paying now.
Double for what? Or are you referring only to GLPs?

For reta, Uther is almost twice what I paid, per mg:

Uther is $1.13 per mg for reta, for the R40 for $450. I paid 66 cents per mg, which is 42 percent less, and mine included group testing since it was a group buy.
 
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