Just a suggestion (no financial interest), I picked up a Gretsch 9470 banjolele new at the local GC for under $250 (there is usually some kind of discount as well).
The Gretsch 9470 in the store sounded thumpy. Brought it home, changed the strings to Aquila Nyguts, tuned (properly tightened) the head (very important!), set up the nut to a better string height, replaced the stock bridge with a $5 Deering Banjo 4-string bridge, and re-set the bridge position for proper intonation. The result is a banjolele that now gets as much playing time as my Deering 17-Fret Tenor Banjo.
Many banjoleles (new and used) are not set up right for optimum (or even adequate) performance. As a result a lot of makes get poor reviews from customers expecting out-of-the-box decent spund or have had the instrument "set up" by techs/luthiers who are not banjo-centric.
Good luck on the hunt. Your price range is reasonable, especially if you are ready to spend another $15 for decent strings and a banjo-quality bridge.