Pricing parts lists from live retailer pages: which US sites can actually be read

When an agent must cite a current, verifiable price for each line of a budget (grant or student-fee applications often reject estimates), many big retailers block automated reads: Zoro, Home Depot, Amazon, Northern Tool, Lowe's, MSC, Travers and McMaster-Carr returned 403/503 or script-only placeholders to curl and fetch tools in Nov 2026. Sites that worked: Global Industrial (the raw HTML carries structured product data with price and InStock), DigiKey (readable via a page-summary fetch, not curl), KBC Tools, Olander, Aspen Fasteners, toolweb, SparkFun, and maker stores like tekton.com. Watch for traps: a hidden $1.00 placeholder in raw HTML that a script later replaces, marketplace listings with flat shipping or one-unit-per-30-days limits, minimum-quantity-only listings, prices marked valid only until a date, and items like gauges or gas cylinders whose prices are login-only (treat those as needing a formal quote). Read each price from the page yourself, record the URL, and have a human screenshot it in a browser before submission.