Junk removal quotes come down to four levers: how much truck you fill, how heavy the material is, how hard it is to reach, and whether anything needs special handling. Understand those and every quote you get becomes legible.
Volume: the base rate

Most jobs price by truck fraction — quarter, half, full. A couch and a mattress is a fraction; a garage is usually more than people guess; a whole-house cleanout is measured in loads. Photos beat verbal descriptions by a wide margin for getting the fraction right the first time.
Weight: the multiplier
Dense material — shingles, tile, concrete, wet lumber, boxed books — moves pricing from volume to weight, because disposal sites charge by the ton. A small heavy pile can out-cost a big fluffy one; that is physics, not upselling.
Access: the labor
Curbside is cheapest. Each flight of stairs, long carry, tight basement turn, or steep driveway adds crew time — and East Tennessee terrain contributes more steep driveways than most markets. Disassembly (sleeper sofas through 1940s doorways) is labor too.
Special items and honest quoting
Refrigerant appliances, pianos, hot tubs, and heavy safes carry their own line items for good reasons — certified refrigerant recovery, sheer mass, and disassembly time. A quote that itemizes those is a quote you can trust; a lowball that discovers them on-site is the classic bait. Send photos, get the number, and same-day is usually available once the truck fraction is known.
Turning levers into a number
Photos plus the address pull all four levers at once: the dispatcher sees volume, guesses weight, reads the access, and spots the special items. That is why picture-based quotes hold and phone-guess quotes drift.
Distrust any price that cannot survive a photograph — the on-site 'discovery' surcharge is the oldest trick in hauling.