OK, confession time...
First plane (C-172) for young RD...
Was working on IR(A) with about 100 hrs total under my belt.
Experienced CFII found something "promising" for me on TaP in FL (I was NE), talked to the guy on phone (pre internet), as did I, and all sounded good for my IR training (ILS + navcom + ADF, no GPS or DME or A/P, mode A only xponder), price within budget.
CFII and I flew down to FL by airline on one-way tickets, got hotel room, next day inspected logs and plane, signed papers and off we flew northbound.
I was in midst of IFR training at the time, used to IMC, and we got lots of it on our hop-scotch journey home, except...
First stop in GA, we are "shooting the ILS" in light rain showers, no big deal since ceilings advertized well above mins, except...
Tracking the LOC inbound, waiting to intercept GS, except it never comes in...
No, it's not notam'd, no outage report, but no-can-do.
We revert to LOC only, report GS OTS, land no problem, refuel and stay on trek home. Back home do some digging. GS receiver is a separate unit, remotely mounted in back, except...
Mounting frame sitting there nice and pretty, empty with
no GS!
Seller (FBO) who had seemed like a nice guy, claimed surprise (swore up and down "I had no idea!"), was nice enough to ship us GS unit, snapped in, worked great.
Ended up pulling almost 700 hrs on that bird in 3 years, plenty of it IMC.
I'll save a couple more "surprises" on it over those years for some other time, but I am around today to tell about it, got nice piece of change back selling it at end, and still harbor warm thoughts about my cozy old "purple skyhawk".
Became much more careful with pre-buys after that...