No way. Wayyy to high priced, especially for the airframe time (not to mention it was obviously a trainer). The engine is mid-time, so not too bad but you can do much much better for less.
I'm in the market for a nice IFR 150 as well. About how much are you willing to spend? You can get into a nice VFR 150 with 6-pack instruments with low to mid-time engine (<900 hrs) for $18-20k right now easy (single digital nav/com typically). For $2500, you can buy and install a KLN-89B IFR GPS with annunciator/switch. /G is a great way to go. I feel perfectly comfortable flying with one VOR and a GPS. What would be best (though def not necessary) is if you could get a second CDI for a few hundred more to dedicate to the GPS. That would eliminate the need for the switch (though you'll still need the annunciator).
Dual Coms are great, but it really just depends how much you plan to fly in the soup with your 150 and how much useful load you want to use up. 1 panel com and a back-up handheld works for me since I don't really fly 150s hard IFR. Plus if you already have the panel apart for GPS install, it will cost next to nothing to get the shop to add a duplexer to the Com ant so you can hook up your handheld Com to the external antenna if need be.
Seriously consider buying a VFR 150 to upgrade IF all it needs is a GPS. Just because it's not currently IFR certified doesn't mean a 2 hr pitot static, alt, and xponder check can't make it that way. There are very few /G 150s on the market. You may find yourself paying a lot or waiting a long time to get what you want turn key. Adding a used KLN 89B (or other IFR GPS) isn't that hard. Good luck!
