Re: Does it matter where you buy the WiFi only iPad from?
All Apple products are usually kept on a tight 'price regulation' (they actually increased the price of the iPad in Japan when it started losing parity to the USDollar) if bought from the official retailers. You can, however, find better deals online from stores that bought a wholesale batch and start selling those iPads at a lower price than at retail. Or by getting special promotions or buying them while abroad and in a country that offers tax returns to tourists.
Since all iPads are built in the same factory and just shipped worldwide, it doesn't really matter where you buy one AS LONG AS YOU DON'T GET THE 3G/4G MODEL. Then you do need to take into account which cellphone bands it uses or it might not be compatible with whatever is available in your country. But if you get the WiFi model, you should be fine.
Like me, for instance, I got the 128GB model at the price point of a 64GB one. How? Visa promotion at Yodabashi Camera Tokyo where they offered 5% off if you used your Visa card to pay, and also 5% tax return from the store because I'm a foreigner. 10% total discount in the end. For instance, if I were to buy a few of those here, I could go back to the US, sell those at a 5% lower price than retail and still gain 5% off the sale.