No reads on this guy...had recently sat in...generally he's calling with a better King or a draw.

Is it better to check/call the river or check/fold to an unreasonable bet?
I just don't like getting into that situation, where I have a fairly strong hand, no one tells me I'm beat, but the board gets semi-nasty - I check the river and they push...doesn't tell me I'm necessarily beat because it also looks like I missed my draw.
I figure if I'm raised here, I'm beat and can get out...otherwise I at least get a reasonably priced showdown.

Paradise Poker
No Limit Holdem Ring game
Blinds: $0.10/$0.25
9 players
Converter

Stack sizes:
UTG: $29.40
UTG+1: $22.90
MP1: $21.30
MP2: $5.35
MP3: $32.30
CO: $26.55
Button: $45.15
SB: $24.75
xTheHorrorx: $24.05

Pre-flop: (9 players) xTheHorrorx is BB with K 8
UTG calls, UTG+1 calls, 3 folds, CO calls, Button folds, SB calls, xTheHorrorx checks.

Flop: 6 K 8 ($1.25, 5 players)
SB checks, xTheHorrorx bets $1, 2 folds, CO calls, SB folds.

Turn: 7 ($3.25, 2 players)
xTheHorrorx bets $2, CO calls.

River: 4 ($7.25, 2 players)
xTheHorrorx bets $3, CO calls.

Results:
Final pot: $13.25