How much do counterstamps effect old copper value and grade?

Take for example this old large cent:
https://www.ebay.com/itm/1793-U-S-Large-Cent-Clear-Date-RARE/203058283514?_trkparms=aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D225085%26meid%3Dc1b54a98375647d48ba639165f9a18bd%26pid%3D100005%26rk%3D1%26rkt%3D12%26mehot%3Dpf%26sd%3D254680303025%26itm%3D203058283514%26pmt%3D0%26noa%3D1%26pg%3D2047675%26algv%3DDefaultOrganic&_trksid=p2047675.c100005.m1851
Nice key date with some details left, but stamped on both sides, how would this effect the technical grade that old copper collectors use? Also how much does it effect the value?

 

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IMO it’s at full money now. Any higher and you are overpaying. You can buy much nicer G/VG details coins without any counterstamping for $2000 or less

 

https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/274399392884

 

It can also depend on the die variety. The coin from the OP is a S-6, not a particularly rare variety so it is probably at its max price. But if it had been a S-7 it would still have a ways to go. There is a 1794 in the EAC auction tonight that has been counterstamped twice with a full name on both sides. I was offered it at Central states last year and seriously considered it.......at $6,000. It's a S-33 and one of the toughest 1794's to get.

 

It all depends on the coin, the Die, Date, Variety and the Counterstamp itself. Some are common but some of those counterstamps are rare.

 

I have one counter stamped large cent with a 19th century political slogan on it. I won’t bother with one unless the counter stamp means something to me. I think many collectors feel that way, which lowers the value of those coins.

 

It's damaged goods.......unless the 'counter-stamp' is of some known variety/person/hallmark, the point is moot........still collectable, but not particularly of any value. Why is everyone trying to make a million bucks? Play Lotto......you've got a better chance of striking it rich.

 

Counterstamps are Damage to the coin but there are a bunch of collectors of these items.