More boards that I am just not 100% on. Thanks for any help you can give. On board 17, do you need to remove the two metal brackets?

Little boards. 7 8 10 midgrade. Rest peripheral. Will do the reat shortly.

Modem board is peripheral.
3 & 4 seem peripherals if pins are gold plated
5 & 6 are mid grade
9 looks like telecom
13 is a backplane
15 looks peripheral. If it is from a cd/dvd rom then cd board
16 & 17 peripherals
1 & 2 look like midgrades
11 & 12 seem midgrades

Lostinlodos can give you a final

Ohkay full list by numbers
1-4 peripheral
5-8 probably midgrade
9 peripheral
10 midgrade
11 peripheral
12 midgrade
13-16 peripheral
17 probably small socket.
I know the south bridge is missing but the co-processor socket makes up for it (qfpa socket)
I've sent in quit a few similar boards and have always gotten small or peripheral. Looks like an old kit/single unit board.
Not enough to make telco.