If it was me, I'd refuse to do business with a site that increased the price merely because I came back for a second look. To me that's too much like a scam and I wouldn't trust them.
You can also check your router and see what MAC address it has assigned to the WAN interface. If it will let you change that, you should see a new IP address assigned when you reboot it. Or (b), depending on your ISP, it might decide that it's not the MAC address it was expecting and throw you off completely. There is a finite chance that if you manage to change it to something that matched another device on the ISP's local subnet that it'll confuse the hell out of things, but that's a millions-to-one chance.
(Don't worry if the acronyms are gobbledegook, you should at least recognise them on a typical router web interface.)