Should I buy a used Surface Go 2 or Lenovo Duet 5?

If you mean the Lenovo Chromebook Duet 5, I’d buy the Duet 5 for most casual use, and the Surface Go 2 only if you specifically need Windows.

Best choice by use case:

• Choose the Lenovo Duet 5 if your work is mostly web browsing, email, Google Docs, streaming, video calls, and Android/ChromeOS apps. It is likely the simpler, lower-maintenance choice if ChromeOS does everything you need.
• Choose the Surface Go 2 if you need Windows desktop apps, specific school/work software, better file-system flexibility, or a more traditional PC setup.

For used buying, the exact configuration matters a lot:

• For the Surface Go 2, I’d avoid weak configurations if possible. Prefer 8GB RAM and 128GB storage; the Core m3 version is better than the lower-end Pentium models. Make sure the keyboard cover, charger, battery, screen, kickstand, and ports are all in good condition.
• For the Lenovo Duet 5, prefer 8GB RAM if available, and confirm the keyboard/stand are included and not worn out. Also check the Chromebook’s Auto Update Expiration date, because long-term ChromeOS update support matters in 2026.

My practical recommendation: if both are similarly priced and you do not need Windows, get the Lenovo Duet 5. If the Surface Go 2 is much cheaper, has the better 8GB/128GB or Core m3 configuration, and you need Windows apps, then the Surface Go 2 makes sense.

I would not choose based only on broad claims like “better screen,” “better build,” or “more laptop-like” without comparing the exact used units, accessories, condition, and price.