I commonly see currently-available OEM parts on Ebay for more than they cost at a dealer.
Ebay ain't free, and neither is shipping... even shipping on ebay isn't free, since they started charging fees on shipping to close that loophole years ago.
I bought a bunch of little stuff last year, from my kinda-local favorite dealer. A little fixing up my old 260, a little swapping parts on my new 400, a lot of stocking up parts I figured I should have in the toolbox. Called with part numbers, told them it was absolutely no rush, throw it on your stock order, call me when it's all in & I'll come get it.
Called me a week later & said it was all in... turns out when I got there it was half in. And they hit me with about $10 shipping. Came back the next week to get the rest... and paid another $10ish shipping for the other stuff they shipped in separately for some reason. Obviously I get that that's dealer dependent... but that was the card I drew.
For giggles I checked one of the major Stihl new part sellers on the 'bay... he had everything I'd bought, with shipping it was about $10 less than what I spent, and a couple things he sold in larger lots than what I'd bought. I'm not even anything remotely like far from this dealer, but even if they hadn't charged me any of the shipping they did, and I hadn't made 2 trips, I'd have spent an hour driving there to save $10 over having a little more stuff dropped on my porch. As it is, I spent $10 more & spent 2 hours making 2 round trips... probably waited longer too.