The most important thing to look for is the diameter of the aperture.
Your resolution is proportional to the diameter of the telescope (absent atmospheric conditions).
I would recommend a minimum of 6" in diameter. 8-12" is preferred.
With this in mind, the best telescope you can get for the price is a Dobsonian.
Dobsonians are extremely mechanically and optically simple.
This makes them long, and bulky.
It also makes them cheap.
It also makes them rather easy to point.
They have a lot of mass and inertia, and a large moment of inertia.
This makes them easy to move and point slowly and carefully.
Dobsonians are ideal beginner telescopes.
Easy to point, cheap, good resolution.
They're also rather easy to construct, if you are of a DIY mind.
Here's a 90 minute youtube video on how to build one, with John Dobson himself: https://www.youtube.com/watch?v=snz7JJlSZvw
With this in mind, the best telescope you can get for the price is a Dobsonian. Dobsonians are extremely mechanically and optically simple. This makes them long, and bulky. It also makes them cheap. It also makes them rather easy to point. They have a lot of mass and inertia, and a large moment of inertia. This makes them easy to move and point slowly and carefully.
Dobsonians are ideal beginner telescopes. Easy to point, cheap, good resolution.
This is the model I have (8" aperture, $450): https://www.amazon.com/Orion-8945-SkyQuest-Dobsonian-Telesco...
They're also rather easy to construct, if you are of a DIY mind. Here's a 90 minute youtube video on how to build one, with John Dobson himself: https://www.youtube.com/watch?v=snz7JJlSZvw