Good, cheap starters for a Master System Library?

[recorderdude]

Okay, so I just scored a power base converter for a little less than $24, but I don't have any SMS games yet. I'd like to get a library started with the rest of my monthly allocated game funds - I've got about $16 left.

Alex Kidd In Miracle World appears to have bloated up considerably along with a good chunk of the SMS library, and the only other SMS games I know of well are the 8-bit Sonics, Shinobi and Quartet. Most every price guide for SMS I've found is pretty out of date as prices seem to have shot up considerably. So, DP, I come to ask:

What cheap (<$10) SMS games are worth buying?

Thanks in advance.