Hi. I am looking for a third party P-TTL flash for K-30. It may be a Sigma EF-610 ST or EF-530 ST (not DG super models) or the more inexpensive Vivitar DF-393; Bower SFD926P, or Tumax DPT386AFZ. However, I read over the forum that these flashes (even Sigma) may not be compatible with K-30. So if you want to sell your flash that you have successfully used in P-TTL mode with your K-30, please PM me. I prefer USPS first class mail from US to Turkey.
Prices in the "sold items" of the forum are generally fine for me and not willing to spend more.
Thank you for looking
N.B. My information about P-TTL flash is based on "The definitive guide to Pentax hot shoe flashes and compatible 3rd-party options"(
The Definitive Guide - Pentax P-TTL Flash Comparison)