It really pisses me off that A) they don't say on their website which sets will ever be sold in a physical LEGO store or not, and B) whether a set is limited edition or not, and what limited edition might mean. There was no indication that the Mars Rover would never show up physically in stores, or that it would sell out by the 3rd month of the year and never be available again. I really wanted one of these. I'd been following it for a year or so, and thought I'd just have to wait for it to show up in stores 6 months later, after demand had fallen, like the Back to the Future set did (LEGO store clerks I spoke to in store said they were selling out the day the truck came in with a shipment). If a set is really popular and selling out quickly, you'd usually expect a company to make a bunch more to sell for more profit , like they did for the Back to the Future set, but for some reason this logic was not followed for the Mars Rover.
I've been looking forward to this Female Scientists set for a while now too, and I'm worried that I won't be able to ever buy one if they follow the same pattern as the LEGO Mars Rover. Paying 2x-3x on E-Bay is not an acceptable option, and mail order from the online LEGO Store directly is generally out for me as well, since there is too much risk of delivered items being stolen off my apartment doorstep. If they follow the same pattern as the Mars Rover and don't sell these in LEGO stores, and stop selling them at all after 3-4 months, then I will be very sad