I'm currently selling all of my Pentax equipment as I'm upgrading to a Canon 5D MkIII. It's all in great condition, here are the links below to the eBay listings:

Pentax K20D with 18-55mm kit lens and spare battery

http://www.ebay.co.uk/itm/Pentax-K20D-14-6-MP-Digital-SLR-Camera-Kit-w-18-55mm-L...

Pentax 55-300 DA F4-5.8ED

http://www.ebay.co.uk/itm/SMC-Pentax-DA-f4-5-8-55-300mm-ED-lens-/141089486292?pt...

Pentax DA fish eye 10-17mm F3.5-4.5 ED (IF)
http://www.ebay.co.uk/itm/Pentax-SMC-DA-fish-eye-10-17mm-F3-5-4-5-ED-IF-lens-/14...

Pentax DA 16-50mm F2.8ED AL (IF) SDM
http://www.ebay.co.uk/itm/Pentax-SMC-DA-16-50mm-F2-8ED-AL-IF-SDM-lens-/141089505...

Pentax DA 50-135mm F2.8ED (IF) SDM

http://www.ebay.co.uk/itm/Pentax-SMC-DA-50-135mm-F2-8-ED-IF-SDM-lens-/1410895117...

Pentax SMC DA 300mm F4ED (IF) SDM

http://www.ebay.co.uk/itm/Pentax-SMC-DA-300mm-F4ED-IF-SDM-lens-/141089516050?pt=...

Pentax 50mm f2.8 SMC D FA Macro Lens

http://www.ebay.co.uk/itm/Pentax-50mm-f2-8-SMC-D-FA-Macro-Lens-/141089519052?pt=...

Any questions just ask!

Thanks,

Ben