No not at all, having only been back in the hobby a few years lots to buy and like most have to pick and choose as to what is higher on the "priority list". So loco sell quicker than other and if you don't jump when they are released then you lose out. I am abroad so don't have the option of local models shops or driving to one. Postage is expensive so I try to do my shopping at a couple of the larger retailers and buy a few items at once.
Not really but as Basil said to Sybil " Can we get you on mastermind, next contestant Sybil Fawlty, specialist subject the bleeding obvious".