Limited DA21mm buy ?

Hi I've noticed a reasonably cheap DA21mm F3.2 for sale on ebay 2nd hand ( missing the front cap mind you ) and as I've recently sold my "M" series 20mm I thought this might be a good replacement.

I used the 20mm F4 a lot because it was small and you could just stick it in your pocket.

Any thoughts ? I'd rather have the FA20 but I haven't seen one on sale for ages.

Any thoughts on this lens, I'd be attempting to use it on my quirky DS. Anyone got one for less than £200 ?