Another big Rivitalash fan here, been using it for a couple of years now, so am on a maintenance programme (use it 3 days a week rather than daily). I bought my first tube from QVC in a TSV as I know that it can cause irritation, so wanted to be able to return it if that happened to me. Whilst it did make my eye lid lash line very slightly red on first use, it wasn't itchy and I persevered as I know my eyes and knew that if I was having a bad reaction, then they would be itchy too. I can get red skin just from washing my face, so it is not unusual for my skin to redden. As I predicted, my skin settled back down, and I have used it ever since. I too buy on Ebay now, but it is getting harder and harder to buy at a good price. For my last tube, I had to bid on I think nearly a dozen auctions over almost a month before I was able to buy at the price I wanted to pay. I may buy the TSV and sell the other bits so I have one in hand. I do find the tubes last much longer than they say. I always had very long lashes in my youth and Rivatalash has helped return them to their former length and volume.
This product seems to cause very adverse comment from non-users. At the time of the last TSV, there was comment that users of the item were vain, stupid and uncharitable in choosing to use this. There is no doubt that it is expensive and you do have to maintain it to continue with the results, but if you can afford it and it gives you pleasure, then go for it. I really think that this is one of those items when the QVC 30 day MBG is worth paying a small premium for, if purchasing for the first time.