The Sharks pre-sale started today so I got my seat. Having learned that I wouldn't be able to get an aisle seat, I just selected a seat third from the aisle and had no problem. Given my new retirement budget and sadly assuming I had already attended my last live skating event, it was a very pleasant surprise to get my larger than expected federal tax refund and realize I would be able to afford Nationals, after all, as long as I could stay at a budget hotel within walking distance, which I am. Not platinum level seats, of course, but I selected a $525 seat and I'm happy with it.
Edited to add that I did try and select an aisle seat to start just in case I could, but I couldn't.