I speak from reading and not from experience...

My understanding is that one should start with
- a shave-ready razor ! (most important)
- a round point ("safer") (second most important)
- a 6/8, 7/8, or 8/8 ("larger")
- 1/2, 1/4, or less hollow ("heavier, stiffer")
- (really optional) a stainless blade (less rust, edge last longer)

You can easily find that from $30 to $70 USD on SRP's classifieds (as long as it is "shave ready" from a trusted seller).

cheers
christophe