The modules themselves are worth $100 a piece or so, probably more for the 70cm module. That is a pretty good deal overall. Has a few things up on the TS140 like a built in tuner, built in keyer, CW filter is standard. Digital SWR and PO meter.
73s John AA5JG
I think the FT-767GX absolutely blows away a TS-140S in every possible respect except portability. If I had both, I'd never turn on the TS-140S.
The 767GX, besides being simply a better performer in every way that can be measured, has better TX IM3 (-40 dB), making it one of the "cleanest" transmitters ever produced by the "big three" companies; a built-in AC power supply; a built-in automatic antenna tuner; IF shift and notch; a real speech processor; and a CAT interface to allow computer controlled operation. This was, in the late 1980s, a highly desired "contesters" rig for a couple of years.
I'd gladly pay $500 for one right now if I could verify it's in working condition, even without any VHF modules.