All guides

Generic listing text can hide condition gaps, especially when photos are limited.

Used receivers should be checked for inputs, channel output, heat, remotes, and serviceability.

Some used items are reasonable buys only if cleaning, sanitizing, or replacing wear parts is simple.

Shelving needs checks for sagging, wall attachment, stability, and transport before buying used.

Refurbished monitors need checks for pixels, ports, stands, resolution, and return terms.