This question comes up a lot... Fortunately you have included the critical information on requirements that most omit: budget and the material you wish to record
I assume $450 is your entire budget. So you may want to consider a used recorder and some external mics, possibly with a battery box.
Buying new, the sony m10 is a great recorder and would be my choice. But they are expensive.
Buying used, an R09 or R09HR might be had at a great price. R09's sometimes appear for sale at $80-$100. On ebay in very good condition, they seem to go for closer to $125-$165.
I've owned an r09 (and recently also an m10) since they came out. For your use, an r09 will produce results comparable to an m10 or any other recorder. You just need to treat the input jacks gently and not stress them by torquing a long plug.
Best results: $80 for a used r09 and the rest on mics
Maybe a pair of Chris Church's mics. That would give you great results.