@George,
I know, right?
The funny thing is, plumbing fixtures like a nice faucet with a built in sprayer cost a lot Less in the US, and no one (it seems) uses medicine cabinets. So I bought both in Texas and schlepped them when I drove down in October.
This time I'm bringing a floor lamp, a round rug I bought online and a few miscellaneous knobs, decorations etc. Shopping is not my idea of a way to spend my time when I'm down there. Internet shopping has not at all taken off in Mexico. There's a lack of trust of the sellers. I explained to an amiga that there isn't a problem if you're buying from a well known company, but she was skeptical. I give it a few more years to catch on.
I'm not really clear on if there is, or how a postal service in Mexico works. I know expats in San Miguel go to a local mailing service that specializes in transporting mail and packages across the border.
Local businesses, if they need to send someone a bill or something, have an employee ride around on a scooter and hand deliver it. One day I was looking out the window, and saw a guy from I think the electric company get off his scooter and come up the walkway. I thought maybe there was an service issue, and waited for him to knock at the gate. It never came. When I went outside later, I saw that he had pushed my neighbors electric bill under the door.
It's like living in Mayberry in many ways.