Dreamcasts are easy to find. Find a used electronic store or a game store that isn't Gamestop. Or eBay it. Dreamcast + Shenmue 1would run you...$40 at least. Shenmue 2 can go upwards of 90+. The Xbox version tho...$5 at the cheapest.
It doesn't bother me that it isn't open world because whenever those games have been open world they do nothing with the open world anyway except for a few "Save this guy from falling off a building" side missions and they always got boring to me.