The Eton E100 is the same as the Tecsun PL-200. Do a search in this group
and you may find some interesting things.

The Eton E10 is the same as the PL-550. You may find it performs a bit
better than the E100.

The G4000A or YB-400PE will probably perform better in general than both of
these. Also available from Radio Shack.

The S-350 is single conversion super hetrodyne. It is subject to a lot of
images. If the original version (not the 350DL) it will drift a lot as
well. It does have a substantial ferrite bar, although some say that the
350DL is less sensitive than the 350.