Microphone recommendation for recording 2 channel demos

I sometimes wish I aspired to achieve sound at the level of youtube.

I would suggest to contact one of the largest pro audio retailers such as B&H and browse through their inventory of used and new items. They have sales video-chat and you can get offers for your budget 

https://www.bhphotovideo.com/c/browse/Microphones/ci/14929

@carlsbad2  Obviously sound demos are just for fun. Not really looking to get into the merits of their sound. I do enjoy sound sommeliers videos and wouldn't mind having sound quality like him. Good sound on youtube is still better than crappy youtube sound.

@OP. If you are prepared to do a little post production work, one of the Zoom H series recorders, which are an all in one solution incuding stereo mics, are a superb value/sq solution. You'll have to sync the audio to you video though.

If that's too much, Rode mics are gnerally excellent and fair value for money.

The Sony PCM-D10 is an awesome portable recorder with excellent built-in microphones.  Also great for digitizing vinyl up to 24/192.  Built like a tank. And right within your budget.  I use mine to record live concerts and recitals, sometimes using external microphones for large ensembles.