Small purchase or informal quote
If the project sits under your micro-purchase or informal quote threshold, request a written quote and issue a PO. Many policies ask for 2 or 3 quotes at this level. We reply in your format, and we can split a project into fixed-price phases.
For purchases paid with federal award funds, 2 CFR 200 sets the micro-purchase threshold at $15,000 and the simplified acquisition threshold at $350,000, from Oct 1, 2025.
Source: OMB final rule revising 2 CFR 200, 90 FR 41872.