Proshave sells Sedef shavettes with and without blades. Sedef is a Turkish manufacturer that makes very good quality shavettes at a very low price.
A shavette is a good place to start if you just want to see if a straight razor is right for you before investing in one. Of course, a shavette cannot be compared to a real straight, but you will be able to practice your technique and get a good shave.
These shavettes use disposable blades. So you always get a sharp blade, ensuring a close and comfortable shave every single time.