I think the rarity and price of the PAL version of Pengo for the Atari 2600 are way off.

Currently the rarity in the database is R8, but i propose to make this a R10. Why? Exact production numbers of this game are not known, but it was only sold in a few shops in the UK for a limited time at the end of the Atari 2600's lifecycle. Also, so far only 4 copies (all loose) have been confirmed to exist. In comparison, Mangia (which is a R9) is much, much easier to get.
I don't know what the correct value would be, but $35 is a very low estimate. I've talked to several PAL collectors about this game and they wouldn't hesitate to pay at least a few hunderd $$$ for this game.