Depends on the game
bjgobble,
For a 6D game, the Wizard of Odds gives two paytables: A & B (see link). For paytable A, a first-card Qh makes the sidebet worth +289.73%, while for paytable B, a first-card Qh makes the sidebet worth +387.77%.
First-card Qh EV:
Hand Paytable A Probability Return
Qh-Qh & BJ 1000 6.05220E-04 0.6052200
Qh-Qh 125 1.22980E-02 1.5372507
Matched 20 19 0.00000E+00 0.0000000
Suited 20 9 5.80645E-02 0.5225806
Unsuited 20 4 2.32258E-01 0.9290323
Loser -1 6.96774E-01 -0.6967742
Total 2.8973095
Hand Paytable B
Qh-Qh & BJ 1000 6.05220E-04 0.6052200
Qh-Qh 200 1.22980E-02 2.4596012
Matched 20 25 0.00000E+00 0.0000000
Suited 20 10 5.80645E-02 0.5806452
Unsuited 20 4 2.32258E-01 0.9290323
Loser -1 6.96774E-01 -0.6967742
Total 3.8777244
.
Hope this helps!
Dog Hand