Ok, scratch ordering direct, unless you want to have something shipped to an FFL and pay the transfer, but with the shipping and transfer fee, you're just about at gun show/shop prices.
Whats hot right now are the Yugo 24/47s. They're similar to the K98 Mauser, only the handguard is past the rear sight and they have a straight bolt. They're fairly inexpensive at around $120 being a good price. Like mentioned they're also pretty accurate, most are still brand new condition unless you get a shooter grade, and they usually come with a bayonet and ammo pouch.
Then there are the Russian capture K98 Mausers that seem to be everywhere now. These are more expensive at around $250 to $300 for an average price. They're WW2 German K98 Mausers with bent bolts and short handguards that were refurbed by the Russians. With a little work you can return them to almost true form like when issued to the Nazis.
Theres also Yugo M48s here and there. These were plentiful a couple of years ago, but are drying up now. They're shorter length Mausers with bent bolts and full length handguards. Diferent models are M48, M48A and M48B. The M48 has all machined parts, the M48A has a stamped mag floorplate and I think trigger guard, and the M48B has more stamped parts including the barrel bands. Theres also an M48BO which is basically a B with no crest on the reciever because they were manufactured for another country but never made it there. The M48B models tend to have a smoother action I think.
For a while Yugo 98 Mausers were around. These are German K98s that were refurbed by the Yugoslavians. They often have the receiver scrubbed of any German markings and a Yugo crest stamped on top. Theres usually a Nazi eagle here and there found on these that they left behind. These are pretty scarce now.
Then you have your Czech Mausers like the VZ24 and 98/22. The VZ24 is a carbine length model and very well made, and the 98/22 is a Czech version of the Persian long Mauser. Czech Mausers are known to be great shooters and have smooth actions.
As far as Turk Mausers go, the only bad thing about them is the info on using certain ammo in them. Certain models can be iffy when shot with high pressure loads. I'm pretty sure its the older small ring Mauser types. Turks were often made from various long Mausers like Gew98s, 98/22s, and other old Turk Mausers. They were rechambered for 8mm and thats where a lot of the bad publicity of these rifles comes from. If you get a Turk, its easy to find info on what type you have and whether or not its safe for high pressured ammo. Oddly enough Turk 8mm ammo is some of the hottest 8mm ammo out there, go figure. One of my most accurate Mausers is a Turk. I can get 5 shots in a quarter sized group at 50 yards on a good day with it using milsurp ammo.
Mausers like any rifle will shoot diferent depending on ammo. Carbine length Mausers like the K98, 24/47, etc. will shoot better with Yugoslavian 8mm ammo, and long barrel Mausers like the Turks and 98/22s will shoot better with Romanian 8mm ammo. I've been told this is due to bullet weight but I don't reload or check ammo specs so I can't tell you why or how. I just know after using milsurp ammo for so many years I've found it to make sense.
If you do want a shooter Mauser and one thats collectable, go for a nice condition Yugo with bayonet and accessories and get some milsurp Yugo 8mm ammo. Its at all the gun shows and is pretty cheap.
If you want to make sure you're not paying too much for one, get a copy of Shotgun News and check the prices from diferent dealers against what you see at a local shop or show. Just expect to pay $20 to $30 more but given the fact that you can inspect the rifle for bore, crown condition, and matching numbers, its usually worth it.