Is the Oppo-105 with Modwright modifications

That may be true. But if resell drives your purchase decisions, surely this limits the choices you make.
I tend to buy for the long term , so it wasn't a consideration. Those who constantly trade in search of the next big thing also see their money lost.
I guess it's an individual choice we all must make.
I still have a GNS modded Resolution Audio Opus 21 , that I now will sell, and it was a $1500 mod fee. But over the many years it's really a small amount.
I think as long as you are comfortable with the choices you make, do it.

Okay,

I went with the Ric Schultz mods on my Oppo 105 and am quite pleased with the result.

I have had the opportunity to critically listen for only about ten hours and can tell you that Ric's mods have added a lot more detail and weight in my system. I suspect that the better detail in the bass helps to flesh things out and add the weight.

One telling sign of a good player is that when I play the music at low volume, it is all there. I seemed to want to play the stock Oppo 105 louder trying to hear more. That is no longer necessary with the Ric Schultz mods.

The modded 105 is as good, if not better, that the Esoteric SA-50 that I tried in an in house audition.

I figure that I am about $3,000 ahead going the modded Oppo 105 route.

I would suggest auditioniong an Oracle AC 2 power cord by MIT. Players will change but AC power is more likely to deteriorate rather than improve; your power improvement will be permanent.

Dsper, I have heard Rick's unit and had not realize that I was hearing an Oppo 105. I will have to take my Exemplar/Oppo 105 up next time to compare.

Dsper, once again I forgot there are two Rick Schultz. I heard the Rick of High Fidelity Cables system.