wait and scrape up some more $ go for the 800. Nothing better for coin hunting than using bins with volume, pitch adjustments to make the coins stand out. you are in for a quiet hunt. Plus last week found a wheat buried in the same small hole with a 4" rusty nail and 1.5 x 1.5" piece of rusted iron. the 19-20 signal came through pretty good despite the iron.
When using the 800 it just gets better over the more time you use this remarkable machine.