Several years ago I stopped at the North CMP store and purchased a Garand with a Springfield receiver with six digit SN
I sold it to a friend who has returned it to me
Not sure what all affects the value

Why would selling it to a friend and having it returned to you effect the value.

Has absolutely no effect on the value obviously however I am trying to come up with a fair appraisal for what I pay my friend. Obviously prices are different than they were eight years ago.

Some examples:

https://www.gunbroker.com/All/...201%20garand&Sort=13

Having a six digit serial number means your Garand is a pre-war rifle. That generally brings a premium. But condition can also play a big part.

What affects the value is the presence and absence of matching parts. Most M1s have been through rebuild, and even wartime barrels are rare, not to mention pre war. Corrosive ammo and all.
So, get the date off the barrel, and list all the part numbers from all parts. Just having a low number receiver is only a tiny part of the value equation. Also, is the SN 100000, or 999999? Makes a difference if it is all matching.
Also, stock markings mean a lot. Also, if it has all been refinished, which most of them are, that also affects price.
So, it can be priced as a shooter for the current CMP prices, up to several $Ks for a mint matching true top collector grade piece,
That is what affects price.

OP, there can be value in an unmolested CMP gun. Those were sometimes in off-the-rack condition, just as the military would have issued them. Though more recently, with dwindling numbers, the CMP was doing more and more to get them up and running.

There can be more value in a Garand which has had non-matching parts replaced, I have done so myself, but it rarely if ever pays what it costs.

I might leave it alone, but that's me.

We need much more info, esp. pics.

Go check the CMP Garand Forums website and ask around. Like others have said, unless it is a "correct grade" with receiver serial number appropriate parts ie bolt, barrel, stock with cartouches, trigger group, etc, the 6 digit receiver doesn't add much extra value over a low 7 digit. Condition and originality is everything.