Watch your local Craigslist -- mine has a couple of decent looking G3 iBooks (the white ones, not clamshells) for $250 or so. They're getting pretty affordable and, as you know, pretty nice machines. My old G3 desktop (with a similar processor and memory) ran flash stuff just fine.

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1992 300D 2.5T
1980 Euro 300D (sadly, sold)
1998 Jetta TDI, 132K "Rudy"
1974 Triumph TR6
1999 Saab 9-5 wagon (wife's)