USED RECORD GRADING- What's the Problems?

When seller with good feedback says NM I automatically assume that it will be VG+, and in 90% of cases I am correct. When it says VG+ it is quite a range that I got - from VG- to true NM. So I usually expect VG+ record and the right to return it. No need for new grading system, it would only confuse the issue further.
I talk to sellers too in some cases before buying.

Never any problems in buying used, always ask seller questions before purchase like I do with any other audio buy.

When I buy on-line I always just go into it knowing the grading is going to be off by one or two grades. So, a MN- will be a VG+ or VG, etc. I price accordingly. If the price is acceptable for the lowered grade, I'll buy it. That said, I don't buy true collectors records. Most stuff I buy cost less than $20 ea., so I'm never out any significant money if the grading is way off the mark.

Honestly, I have a bigger issue with new $30 -$40+ records that have noise or defects.

When I sell an album as near mint it means that the record next to it on the shelf is mint. Isn’t that right?

all over the map...but in general I appreciate a play grade also...acknowledged that setup and subjective assessment are present as w visual grading...

i grit my teeth on scraping , less so ticks and pops....

just got an unopened MFSL Rock of Ages that has some really rough patches and disc one has a ski jump warp.....hard for seller to know....$32..... oh well....