See, I just cop a real serious attitude when a shop pulls this crap. This is not the 1st one I've heard of to do this.
A business exists to meet the needs of the customer, not the other way around. I don't owe a shop ANYTHING other than to pay for what goods & services I agree to buy, and that may be none. If they want me as a customer, it's up to them to make that happen. It isn't real hard: Treat me fairly, be honest & don't try to blow smoke up my ***, and don't rip me off.
When a shop does this, it is for one reason & one only: They are out to punish you for not buying the item from them, period. This attitude on the part of the owner is an immediate deal breaker for me. Do that to me & you have flat out told me that you do not want my business. Not a problem, rest assured you will never see me darken your door again.
Is it acceptable to sweeten the deal to offer incentives? Sure, buy the reg here & get a discounted service rate. No prob. Don't buy it & pay the full, standard rate for regs purchased elsewhere. Fine. Punish me for it by charging more than the std rate?
Kiss my hairy ***, good by.
I think the world of my LDS. I have given them a lot of business. They've held up their end, and they don't play games like this. If I buy elsewhere & bring it to them for service, they'll regret they didn't make the sale but will be pleased to have what business I bring them. They don't offer discounts for service if I buy from them, they have fixed rates and charge that no matter where the item comes from. They do their best to be competetive on the price of the item up front & provide excellent service when it's needed.
It's a dog-eat-dog world out there & they are not going to willingly put on milk bone underwear. If they ever change, say the current owners retire & sell it, the new owner decides to make this his policy? I'll work with another shop, even if that ends up meaning shipping my regs for service.
With the advent of cheap long distance communication, the internet, email, cheap insured shipping, etc, they do not have a monopoly lock on customers. We can & will go elsewhere, and if pushed hard enough a compressor is not that huge an investment to be out of the question. For about what many people spend to go on one dive vacation I can be doing nitrox fills at my home.