matsuman wrote on Jun 17^th, 2021 at 8:43pm:

Good Luck on that, how is the main gear? You know the 300ER has that extra strut support in front of the main gear. The standard 300 don't. Then the logic of buying this for ten dollar cheaper and no need to get the base pack. So those (including me) got nailed for buying the 200ER base pack and someone can get the same base pack but it's the 300ER. For those that got the 200ER base pack, this should have been a free add-on. Because nothing changed. The 300ER is my favorite aircraft so i will get sucked in on getting this for 19 bucks. That will be a total of 50 bucks i've spent on this MSFS addon that mimics the B748 logic. That's my story and i'm sticking with it.

Impulse-buying products when the developer has not stated how he'll release the entire line (all stand-alone's, base pack/expansion, etc) can cause unnecessary spending as you've just discovered.
I asked CS how he'd release the -300 and Freighter a while back and he never answered...I guess we know why now.  ::)

We all just assumed that it would be the traditional Base pack/Expansion as this has been the norm...even for the 777 in P3D.  You know what they say about when you "assume" something.  ;)

Bet you'll wait to see how he'll releases the rest of the MSFS product lines from now on before you buy the 1st in the series, huh?  ;D