Hiya Snow Princess. Basically haggle as much as you can. They will bother you until you buy one, then after you buy one, they do not want to know you. I think I payed about 6 lev each in March for medium sized bell and got some of the smaller ones free.
Basically around the foot of the mountains you get these gypsy men selling you bells. You can here em coming cos they have looooads of them all tied together. They just come up to you every day and try and sell you them as souvenirs. They come in all sizes and are like little cow bells.
Is ok to start with but after a few days you try and dodge them on the way to the initial ski lifts.
oh and they all have stupid names so you remember which one spoke to you hoping that you may buy a bell from them the next day - like 'Brenden BMW' cos he wears a beenie hat with BMW on it.
I think there are others called 'Annoying as hell Harry' Smells like chicken Charlie' and 'What's a bath then?, Glen'.
They sometimes offer you a Free one, Take it, Buy a New Hat and wear your dark glasses all week so they don't recognise you. I've got 3 free ones, trying for a 4th on Jan 26th.