FS: Pentax FA 77 1.8 limited (silver)

Hello all,

I'm sure everybody knows this lens, its light & compact medium telephoto Limited lens, with a slide out hood, superb metal build and top optical quality. It is in very good condition, although shows marks of use...on the lens barrel, bit dust inside and tiny spec on rear element,which doesn't influence the image quality. (Please see the photos)
It is a silver edition, made in Japan.
The lens is sold in the original package: Lens, box, lens pouch, original rear and front cap + high quality B+W 49mm UV filter.
I will accept £600 GBP or similar reasonable price.
I prefer Paypal, if you're allright to pay the paypal fees.
Any queries, please let me know. Link with the photos below:

https://picasaweb.google.com/111604578985957078398/FA77?authkey=Gv1sRgCL-5h8Os1p...

and here are few reviews of the lens:

http://www.lenstip.com/196.1-Lens_review-Pentax_smc_FA_77_mm_f_1.8_Limited-Intro...

http://www.photozone.de/pentax/128-pentax-smc-fa-77mm-f18-limited-review--test-r...

thanks

price reduced to 550 GBP...

Do you know what the speck on the rear element is? is it a chip on the outside surface or something internal?