Many Big Ebay Coin Sellers Don't Assign A Grade

If I sold there I would never assign a grade for raw coins. Doing so could
lead to many issues with buyers because grading is so subjective.

Exactly. Grading is extraordinarily subjective (as we see on this site with the number of people who vehemently disagree with the grades assigned by TPGs), and these are coins which are graded and arbitrated by outsiders. Now imagine the can of worms you open when someone goes into thinking the dealer is biased because they own the piece...

The other major factor is that different countries simply have flat out different grading standards. An American XF is simply not of the same species as a European EF. Thus, when you are selling coins from around the world, to a market around the world, even giving a truly accurate, unbiased grade will lead to problems and unhappy buyers.

IIRC, sellers are (just barely) allowed to call a raw coin VF or XF or whatever, but saying, for example, that the coin is VF-20 or MS-63 is not allowed even if the coin is in a slab that says so, as long as said slab is not from one of the few major grading companies (NGC, PCGS, ANACS, and I think one or two others - can't recall which ones specifically).
I recall that at one time ICCS was not on the "major grading companies" list, which hurt Canadian coin sales a lot as the sellers had to find ways to go around the no-grade policy (IIRC at some point it wasn't even allowed to give a photo of the slab with a visible grade) or risk their listing pulled. Not sure if it's still the case, however.

Mind you, VF as such is ambiguous (British VF is much better than American VF), while (IIRC) VF-20 is not (referring explicitly to the Sheldon scale), but, well, policy is policy.

I certainly do not mean to be disrespectful, but based on my extensive sampling of ebay listings for many, many years, sellers that scribble a numeric grade on a cardboard 2x2 are not putting in a lot of work. I have NEVER seen a detailed numeric grade's description added to a listing for an uncertified coin (or for a certified coin, for that matter).

I believe that ebay allows a seller's opinion of a raw coin's grade in the title or description, but just not a numerical grade.

Here's a quote from ebay coin selling policy:

"Photos or scans of coins in holders from a non-approved grading company cannot show a grade or any text describing the grade or quality of the coin. The grade and text related to the grade must be completely obscured and unreadable."

One might argue that a 2x2 is not a "holder from a non-approved grading company", but ebay also says...

"The numeric grade (such as MS-65, VF-25) isn't included in the title, description, or item specifics of the listing."

...and it would be difficult to argue that photos or images are not part of the description.

I don't think ebay intends to restrict actual grading company holders, but allow just any other holder to show a numeric grade.

As a buyer I appreciate listings such as Toby's. Of course, if the descriptive grade is not matched with a supportive, high quality photo, then I don't bid. But there are a good number of ebay sellers who grade fairly and post excellent photographs of their coins. They almost always have ratings/reviews from customers saying things like "accurate grade", "coin in hand looks just like photo", and the like.

~ Mark

P.S. The really good sellers will also note if a coin looks like it was cleaned, dipped, or otherwise altered.