I was showing mrs kitnut your photo of Jupiter Frank, she was quite impressed with it. This morning I found out she has been digging around the internet and found something similar to your telescope, a Nexstar 4SE, on the local buy & sell website. Mrs kitnut likes to bargain and she has asked me to ask your what you think of the 4SE.
The 4SE has a different optical configuration than my 6 SE (
Gregory Maksutov vs
Schmidt-Cassegrain on the 6SE) the main difference is that the focal ratio is longer - f13. It would be a good telescope for looking at the Moon, and an OK telescope for Venus, Mars, Jupiter, Saturn and some of the brighter deep sky objects. It's not going to be great for astrophotography, though - you'll need to devote time and effort to record video and process it. The 4SE seems to be going for around $530 US. Unless it's a pristine, rarely used telescope, I wouldn't pay more than $250-$300 US. The telescope would be good for terrestrial observing, though.
If you can see the Milky Way easily at night, a good pair of wide angle 7x35 binoculars would be more rewarding. You won't be able to see much detail on the planets, but the view of deep sky objects would be nice, especially paired with a planetarium app like Sky Safari or similar.