Well is well priced for full pedigree if you can train them, know people spend over 1k on a similar aged Dog with only sitting, lead broken, walking to heal and maybe some very basic dummy work.
Without seeing them I really think is doable unless they look out of control and completely ignore you, but I would think about only taking one of them, often seen the case litter mates kept from puppy up to adult work for each other and not you.
Is it possable for you to go spend some time with them singly ? often just them willing to sit calmly with you and hold your gaze will be a good gu