See here were are, 24 hours later from our visit to to the Elektra store on Isla Mujeres, where they staff did their best not to sell us anything. After we bought something said they had in Cancun, and paid cash because they said a debit card purchase wouldn't clear quickly and we might therefore lose the only appropriate air contioner their store in Cancun had, well, we don't have the best right one for Zina's Guest House!
The dimensions as listed on the computer screen weren't correct. A better model was available, but they would not credit the cash purchase here toward it! Ricardo had extra money on him to make up the difference.
He had gone in the rain, a three hour downpour, no cabs available in the two hours after the consummated purchase, albeit not quite what we were looking for.
Now he is at Macaab, buying things to make this unit actually stay in the hole in the wall that is a bit too big for the unit that wasn't as big as we were told it was.
Whatever happens, it's not his fault. Elektra, I do have a good long term memory! I am not advising my friends on Isla Mujeres to shop with you! And hey, the SuperXpress gives a better exchange rate, by a peso, per dollar. And they take $50 bills as well.
Grad students went there to buy a snack and trade a bill for it, betting their change in pesos at the best conversion rate on the island.