I have seen the same thing happen with synth prices and it is definitely stressful when you are on a tight budget. Tracking the used market is honestly tricky because eBay doesnt have a native price history chart thats easy to read for buyers. You should probably stick to the Sold listings filter for now, but make sure to look closely at the actual transaction dates and the final price plus shipping. I would suggest calculating a median price from the last five confirmed sales rather than looking at the average. Those parts-only listings or high-shipping outliers really skew the data and make things look cheaper or more expensive than they really are. It is important to be careful with listings that seem too good to be true, especially if the seller has low feedback or the photos look like stock images. I usually check descriptions for any mention of sticky keys or screen issues, which are common with the Juno-DS series. Also, definitely verify if the power supply is included because thats an extra expense you might not be counting on. If you are looking at a 600 budget, you might want to consider setting a Saved Search alert so you get a notification the second a new one is posted. Speed is usually the only way to catch a fair deal before someone else grabs it. Actually, PriceDropCatch is pretty solid because you dont even need to make an account to use it.

I have used this eBay price tracker for years and I am quite satisfied with the results. It is way better than eyeballing listings because it focuses on actual sold data.

• Use negative keywords like -parts -repair to clean the results.
• Watch the 30-day moving average for the real price floor.
• Set alerts so you dont have to check every hour. Works well and definitely beats guessing.

Late to the party here but I've been hunting synth gear for a decade and honestly, the Tuesday dip is mostly a myth these days since everyone uses auto-bidders anyway. My biggest tip for staying under that 600 mark is to filter specifically for Used condition in the sidebar to kill those Parts listings. Then, always check the Sold box. In my experience, people list high but the actual transactions happen way lower... you gotta look at the green numbers. Also, keep an eye on shipping costs because a 500 dollar synth with 100 dollar shipping is the same as your max budget. It takes a bit of patience but the right deal always pops up eventually if you dont rush it too much. I've been using PriceDropCatch for a few months now to keep an eye on some vintage collectibles I'm after.