Daewoo
I have a Daewoo DR200 in .223, got mine for $550 about a year ago. I have seen DR200's at shops lately for $650 and $750. The only DR300 I have seen was at a shop in Lexington, KY and they were asking $950. Not sure I would pay almost a Grand for a DR300 (7.62 x 39)
I love my DR200 shoots great and is fairly easy to clean. Price also is determined by type of stock. Most common is the thumb hole, but if the one you are looking at has an ACE or folding stock it will bring more. Hope this helps.
Not many people have seen the DR300's (7.62x39) most of the guns were in .223, (DR200)