Molten Vole

Solution for the skeptical
I give to you my left ventricle
Try me
Before you buy me
You'll find that it's plentiful

If you're not certain
I'll lessen the pressing burden
Take a small part of my unconsumed heart
Samples are free so
There's no fee to consider me
Use a sharp knife but please leave me alive

A few vacancies for you to view
Bring waterproofs as the valves might spew
Priced low
Everything must go
Please start an orderly queue

If you're not certain
I'll lessen the pressing burden
Take a small part of my unconsumed heart
If there's a defect
I'll respec so it's correct
I'm quick to react to customer feedback

Be careful how you run tests
Rapport might cause a cardiac arrest
Let me know what's inside your mind
I'll repay you in kind

I hope you realise once you surgically slice

If you're not certain
I'll lessen the pressing burden
Take a small part of my unconsumed heart
Samples are free so
There's no fee to consider me
Use a sharp knife but please leave me alive