Totally agree with
@enlytend . I remember reading article about Perfumebay.com . Ebay won case against them. Ebay is also selling domains on their platform so flipperbay is in that category for sure. Name sounds similar to Ebay and so many people may think your company is part of Ebay which Ebay does not like it. This is the reason they will give in court. I am not lawyer. This is just my opinion. Anything related to Ebay does not mean we always lose but there is high probability that sooner or later need to face some stress and trouble. Ebay has nothing to lose. They have big team of lawyers. Either we win or lose we lose so many thousands dollars for sure. If you are willing to take that risk then it is ok.
I am again saying I am not an expert but we are living in USA and we need to be very careful before we chose domain for particular business. You are ok as long as you do with that name what Ebay doesn't do but problem is Ebay does almost anything so it is very hard to do anything related to their name.
Apple.org was used to be site for Apple Farm so Apple can not take any action against them because Apple company sells gadgets and Apple.org was showing info about Apple fruit which is not related to Apple.com business. Still Apple.org redirect to some other site and all other major extension captured by Apple.
This is just an opinion. This is reality. Need to be careful. Final decision is yours. I am not an expert of anything. Just sharing what I have read or experienced or heard of what happen to other companies.
Thanks