Villein has just sat down, from the size of his stack I assume he's not a reg. Other caller is a fish.

PokerStars No-Limit Hold'em, $0.10 BB (6 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

Hero (MP) ($10.24)
CO ($4.67)
Button ($6.75)
SB ($9.90)
BB ($10)
UTG ($8.15)

Preflop: Hero is MP with 10, 10
UTG bets $0.30, Hero calls $0.30, CO calls $0.30, 3 folds

Flop: ($1.05) 8, 6, 3 (3 players)
UTG checks, Hero bets $0.80, 1 fold, UTG calls $0.80

Turn: ($2.65) 3 (2 players)
UTG checks, Hero bets $2, UTG calls $2

River: ($6.65) J (2 players)
UTG bets $5.05 (All-In), Hero goes wat??????

Hand is standard up to this point, I think he gets to the river with hands like 77, 6x, spade draws and straight draws, maybe the odd monster as well. We need 30% equity vs his range here, call or fold?