Just bought some new e-waste pentaxbros right before I go to Montreal this weekend, my KF actually got awesome pics with a similar promaster until I got a little rough cleaning it and it literally fell apart (little arm connecting aperture blades to lever broke?). I think these older lenses work even better with the FF sensor on the K1s.

Selling atm:

KF w/kit lens 7869 shutter count for $350 ($380-400 on eBay)

100mm Macro with heavy haze for $40 ($60 on eBay)

18-135mm DA (very light haze, still gets nice pics) for $80 ($100 on eBay)

Gonna list a duplicate 70-200mm Takumar-F (sharp as hell with clean optics) and 35-70mm f3.5-4.5 for $30 locally/$40 on eBay.

Split on selling my DA 50mm f1.8 and 55-300mm DA-L since I still have a K200D APSC body. The 55-300mm is fine other than requiring a heavy microadjustment when it was on the KF and the 50mm I barely use but its 100% like new. I'm gonna try to find a FA SMC 50mm or 35mm.