Value Question On A 1937 George VI Penny

Drilled holed common coin ,
no one cares , valueless .
A decent one is less than 2 dollars

to the CCF!

1. There may be a variety catalogue or website which lists prices. But that being said, for the most part variety-hunting isn't as popular in Britain as it is in the States; varieties tend to see less steep prices.

2. "Grading" is, at least in theory, a technical description of how much wear from circulation a coin has received. Toning is a second layer to eye appeal beyond the mere technical grade. I am concerned about the "dirt" mentioned by the OP, and whether or not it is actual literal dirt or (more likely) corrosion. A corroded coin is a damaged coin, whose value will plummet and the coin becomes ungradable.

3. Deliberate damage, such as ngraved graffiti, drilling a hole or soldering the coin onto a piece of jewellery, tends to completely destroy its collector value for all but the most scarce coins. As such, holed coins are generally regarded as "non-gradable" and will be rejected by third-party grading companies. In terms of value, it is hard to predict, as coin collectors vary greatly in terms of opinion on how much a hole devalues a coin. Many collectors will say "it always devalues it completely and is now worth scrap metal value only", others will be prepared to be more generous. My rule of thumb for holed coins is to knock the price down by at least two whole grades, or more if the hole is unnecessarily large or ugly. In the case of your coin with "EF details", that means it ought to be knocked down to at least Fine price, perhaps lower. Which, in the case of your coin, is effectively scrap metal value anyway.