With the telescope, that budget is on the tight side and may need some stretching, as you need the telescope tube, 2 (or 3) eyepieces to view the images at different magnifications, (low (medium) and high), a star diagonal to save your neck and provide comfort while viewing high in the sky and lastly you will need a mount.
With the telescope, that budget is on the tight side and may need some stretching, as you need the telescope tube, 2 (or 3) eyepieces to view the images at different magnifications, (low (medium) and high), a star diagonal to save your neck and provide comfort while viewing high in the sky and lastly you will need a mount. So $ 400 is very tight, even when choosing the minimum quality needed for enjoyable views and to keep using the scope in the future.