In the past, I've bartered my services for using a sauna, for assistance with moving my furniture, etc. Sky is limit :)
Please keep in mind: I may take a few days to review this, and will reach back to you - confirming your appointment (I accept the barter!), or with a counter-offer if the barter does not feel reciprocal.
Also, if this is your preferred option and you want to exchange services - have you considered 'Time Bank' option? It may offer you a lot more flexibility!
is a good resource I've been looking into.