Nvidia still doesn't plans to introduce 8300 based parts but we heard that G86 based Geforce 8500 GT might end up as cheap as €89 a piece.
We don't know much about its performance but we know that Nvidia plans to introduce it on the 17th. It also doesn't require any extra cooling and it can come as a passively cooled part.
This is definitely be the cheapest DirectX 10 capable card on the market at least till ATI unveils its RV610LE generation roughly a month later after Nvidia launches its new cheap baby.
DirectX 10 is set to sink in prices all the way to €59 a card.