Paying Ceremony Musicians

How much should I pay my ceremony musicians?

I'm a musician myself and I found a few friends/acquaintances to perform for my wedding. I'm not sure if I should pay them or not. Should I just get them all a bottle of wine as a gift?

some of them are invited to the reception and some are not. Should I assume them playing for me is their gift?

I'm at a loss. help!

I asked them to play for me. i was think $50 for the ones who are not invited and a bottle of wine for the ones who are invited.

Is 50 too little per person?

How much is everyone paying their ceremony musicians.