tom pettit tompetatpeak wrote:
I'm currently flying VFR in a vfr equipped plane. What would be the lowest
cost GPS based instrument system I could install and be legal for IFR
flying?

Maybe something in the Apollo GX50/55/60/65 series? You'll find, though, that
the cost of installation is a big part of making it IFR, so if you're going to
spend a lot on installation, it seems a shame to waste it on a cheap unit.