I'm the daugher but tired of playing mum!!! Help?

You said it, she is a master manipulator, remember that, you cannot help a person like this, mother or not. Time to let go of maternal guilt and take care of yourself, let her know you care, wish you could help, but there is nothing you can do. Play her game, just a little bit, next time she need something say, the economy is bad, money is not there this time (who actually "NEEDS" a DVD player?) unfortunately times are hard for you, wish you could help, love you mom, very much,i've helped out in the past, I pray for you, that's all I can do right now. And be prepared for the backlash, but don't give in.