The forum consists of a bunch of people just like you and a bunch with varied levels of experience in escrap. We'll give you our best guess. If you get a response from Boardsort that's the grade or Lostinlodos, 99.9% of the time that's the grade. I recommend if you're not sure on a grade to go with the lower grade, this allows Boardsort the ability to upgrade the board and get you more money and not end up with a downgrade and loss of money. If the forum can't get you a clear answer, shoot Chris (boardsort) an email with a link to the post and he'll respond when he's able. That being said, if you are shipping a lot of material and have things you aren't sure on, be sure to separate those boards clearly so they can be checked.
A couple good threads to read through since you're just getting started:
Good examples and explanations of various categories
hereExamples of batteries
hereA-C) My gut reaction was high peripheral, mostly because I see a lot of heavy lower value metal. If the metal connectors aren't as heavy as I think (which is hard to convey in text) it may get into low telco.
D-E) More inclined to think this can get low telco but not definite on this one either.
F) Seems like a common household modem, high peripheral.
G) The heavy ports always throw me off, I'd lean high peripheral to be safe but low telco might be okay
H) Similar to above, low telco seems safe but may be able to clear high telco