this site doesn't sell or supply plants, though there is a link through to Crocus, which does - price depends on the supplier you find.

http://www.stonyfordcottagenursery.co.uk/dicentra-scandens-yellow-bleeding-heart-p-261.html has this plant in a 2L pot for £7.00. I did not know there was such a thing as a climbing Bleeding Heart. To buy in 100g quantities I think you are looking for seed not roots.

You could buy 100 g of root, Scotsgran. We buy ginger root by weight, and potatoes, of course....

You can buy both of those in the supermarket Beattie. I have yet to see perennial plants especially the rarer one sold by root weight. I stand to be corrected though. I was wondering if Akha was in to growing plants as that way it would pay a nursery to buy 100g of seeds.That is a lot of seeds unless they are very heavy. In old money a 100g is 4oz. That would be a hefty root too would it not. Maybe it is edible? Do get back and tell us Akha.

I have just googled this to see what would come up. Dicentra Scandens is now reclassified as Dactylocapnos.

Seems that buying it as a root would be best - doesn't do well in pots and looks tatty fairly quickly, so buying the roots at the right time of year is probably best.

It is interesting to hear you say that Bamboo. I did not come across anyone offering roots for sale. I did find out that one nursery would describe it as tender and another that it was hardy even in frost pockets. Yet a third site said there are several different ones. Some have purple or white flowers. There are 2 yellow ones which are almost indistinguishable butonegrows 1m x 1m and the other grows severalmetres tall. One flowers for a short time the other from Spring through most of the summer. It is nice to come across plants you were unaware of.