About Mechanical Engineering
LEGO 9665 Mechanical Engineering is part of the LEGO Dacta Technic theme, contains 318 pieces. Its original US MSRP was $149.99. BrickPicker tracks live retailer pricing across Amazon, Walmart, Target and LEGO.com, eBay sold history, BrickLink part-out value, retirement forecasts and an investment score for Mechanical Engineering.
Mechanical Engineering: your questions, our data
Answered live from BrickPicker’s market tracking, review analysis and retirement model — these update as the data does.
- What is LEGO 9665 Mechanical Engineering worth today?
- BrickPicker currently values a sealed Mechanical Engineering at $295.91, from live market tracking. That is 97% above its original $149.99 US retail price. The full price history is on this page.
- Is LEGO 9665 Mechanical Engineering a good investment?
- It is still available at retail, and sealed examples currently trade around $295.91 versus a $149.99 MSRP. Retirement is usually the catalyst that moves a set's aftermarket price. BrickPicker subscribers get the full Max Profit analysis for this set, which weighs eBay sold trends, retirement timing, liquidity and reviewer sentiment into one verdict.
- Is LEGO 9665 Mechanical Engineering retired?
- No, it is currently available at retail. BrickPicker tracks its availability across major US retailers daily.
