Many, many people on these forums advocate a minimum of 1500 grams for breeding bp females, specifically because of the increased risk of becoming eggbound from underweight breeding. It is a fact that it is statistically more likely for a 1000 gram female to become eggbound than a 1500+ gram female.

That said, I'd say get yourself an incubator and see if you can't hatch out some eggs, people do successfully breed females at weights less than most will recommend.