Coin 1 of 10 from lot.
Recently I've been looking into ancient coins because the history behind them can be so interesting and it seems like a fun challenge to attribute them. I found one ancient seller online who was auctioning small lots of unidentified coins and I waited for one that seemed worth the price. One came along, 10 coins, ended winning them at $55. $5.50 each seemed pretty good. So far I've identified 8 out of 10 but I have no clue how to find the value or rarity.
I'll be posting all 10 to see if I got these for a good price, if there any rare ones in there, and to try to get help on identifying the last two.
First one looks to be RIC II Trajan #510 (As).


Obverse: IMP CAES NERVAE TRAIANO AVG GER DAC PM TRP COS V P P
Reverse: S P Q R OPTIMO PRINCIPI S C
Weight: 11.44g
Diameter: 27mm
Is my attribution correct? Value? Rarity? Any history behind this one?