To kiss a girl? SAG-AFTRA scale and a good script.
Same goes for kissing guys by the way. (Well, except my husband of course.)
How much for a blowjob?
Hey, I’ve already kissed both genders today! What do I win?
Other than maybe a good parenting award?
Though I admit it does feel a little weird when the sprout gives me a kiss on the lips. Hope they grow out of that one soon.
The question is not how much it would take to get me to kiss him. The question is how much it would take to get him to let me kiss him.
Regards,
Shodan
Probably getting really drunk and then playing a game of truth and dare in a large group since that’s what it took before.
$19.99 plus shipping and handling
With no tongue? Nothing. (But I do want a pic)
With tongue? Meh, maybe a drink, but The Fella gets to watch.
I’ll even buy the drink then! 
Answering for myself - under those circumstances I like the “if I get to kiss you too” response. I’m a little bi-ish myself so it wouldn’t be like breaking any new ground. A friend or comfortable, willing acquaintance? Just a little encouragement. A stranger? Pretty unlikely, although if BrassyPhrase insisted, how could I refuse?
Peck on the lips, closed-mouthed? Sure, if I’ve had some drinks, am in a good mood, and everyone involved is feeling the humor. Anything more would be weird.
Or you could do the thing where you grab the other person’s face lovingly with both your hands, look into their eyes, and lean in for a long, passionate kiss…obscuring from the viewer that you are actually kissing your own thumbs, which you’ve placed over the other person’s lips. 
My gay dude-friend kissed me once and it was basically like licking a toothbrush. Neither repulsive nor interesting. So I’d do it for as much as I could haggle out of a bar bet under the circumstances. I’m thinking $50 or a makeout session with some hot girl who lost a similar bet.
Sure, I’d kiss a random guy, but with the same restriction that applies to random butt-fucking: no eye contact.
The guy would have to be attractive. And no fatties.
I had the same train of thought! But from what actors have said about having to do sex scenes on set, I gather either one isn’t a walk in the park.
$10? I don’t know, it’s not a big deal. It’s not something I get excited about, but it’s not going to threaten my sexuality or gross me out or anything.
I met an exotic dancer in Indonesia, who was an anatomical male who easily and professionally and socially passed as a woman. I found myself attracted to “her” because she would have been skilled at making me feel like I was with a woman. Even though I knew she was anatomically male, I could have enjoyed intimacy with her touch. She was a house guest of my neighbor, so the hypothetical situation never came into play.
I made out with a dude once in college. He was a friend, and he was gay. Partly – okay mostly – it was because we were drunk, and the girls who came to the bar with us asked us to. But partly it was because I didn’t have much self esteem at the time and knowing a guy was attracted to me made me feel almost as good as knowing a girl was.
And partly it was because I was curious. I am not sexually attracted to men, but I remember a time when I wasn’t sexually attracted to women either. I thought I’d give it a fair try. Anyway, we made out off and on for a while (which wasn’t all that different from making out with a girl, except for the stubbly lip), and eventually we got drunk and went home, and he started sticking his hands down my pants, and that’s when I finally decided “Nope, this really isn’t for me”.
I feel bad, because if I was drunkenly making out with a girl I was attracted to all night, it would certainly be disappointing if she had went home with me, only to say “Oops, sorry, I’m a lesbian”.