villain is 30/8, low fold to c-bet, high donk bet over ~100 hands.
I guess KT makes sense, but other than that...
I was tempted to call.

$0.5/$1 No Limit Holdem
9 players
Converted at weaktight.com

Stacks:
UTG not2soon ($228.15)
UTG+1 Hero ($116.10)
MP1 mystikal4 ($100.00)
MP2 VBDave ($98.50)
MP3 mac1357 ($116.15)
CO perfectset07 ($249.75)
BTN Tannfichtele ($20.50)
SB CoolGuy78 ($70.80)
BB Sumo60 ($121.35)

Pre-flop: ($1.50, 9 players) Hero is UTG+1
1 fold, Hero raises to $4, 6 folds, Sumo60 calls $3

Flop: ($8.50, 2 players)
Sumo60 checks, Hero bets $6, Sumo60 calls $6

Turn: ($20.50, 2 players)
Sumo60 bets $11, Hero calls $11

River: ($42.50, 2 players)
Sumo60 bets $19, Hero folds

Final Pot: $61.50

Sumo60 wins $59.40 ( won +$19.40 )
Hero lost -$21