From my experience it depends what you are "classed" as. For example if you are classed as a trainee then you'll most likely get nothing, your payment is the experience of being on a show...if your very lucky you might get £10 - £20. If you are more established with a promotion(s) then the £10's - £20's become more frequent, and they will build up to £30's then from there you can ask for about £50 a training session to £70 - £100 per show...but even then it depends on how well the show draws.
does it really matter how much you can get for shows? - i mean wouldnt you just do a show for the love of entertaining the fans and making sure everyone goes home happy? - i know I would (and have done in the past)
and thats the reason its hard to make a penny when idiots will work for free. excluding charity work your doing yourself and wrestling as a whole no favours by taking away spots from real pros.