They do not need variety.
Would they take it, maybe but not likely.
What you need to think of is if they do will they imprint on the prey item and if so can you provide them with the said prey item weekly?
In that case what happen if you have to re-home your animal?
BP are known to be picky feeders as it is, so offering alternative prey is really not such a great idea with BP.
Now other snakes it's different.
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