Buying professional laser equipment well is mostly a matter of sequence. The first move is to find the documented model for the application you need, using the application pages and the category pages on this site. If the application is served by a documented model, its product page gives you a specification table to work from. If it is served only by a listed family, the category page tells you so, and your first task is to request that family's specification sheet, because a comparison without it is a comparison with a gap in it.
The second move is to compare documented models on documented figures only. The comparison guides on this site model that discipline: the diode versus Alexandrite guide compares only published figures, the fractional CO2 versus erbium guide states the CO2 parameter gap wherever it arises, and the concept guides for picosecond versus Q-switched, IPL versus laser, and cryolipolysis versus EMS refuse to invent a product page for the undocumented side. A buyer who follows the same discipline will avoid the two most common errors in this market, which are borrowing a specification from one model for another and treating a product name as a specification.
The third move is to confirm the commercial terms on inquiry, before payment. Listed minimum order quantities are commonly one piece, or one set for some models, and listed lead time guidance runs up to one month in peak season and within fifteen working days in the off-season. Both are listed guidance to be confirmed for your order, and they can vary with the model and the time of year. Confirm the quantity, the lead time, the payment terms, and the delivery arrangement in writing, and keep the confirmed terms with the order documents. No price is stated on this site or in this guide, and no listed price from any other source should be treated as a quotation without confirmation.
The fourth move is to confirm the market documents. Certificates are available upon request, and the documents that matter depend on the destination market and the intended use. Ask which certificates apply to the exact model as supplied, whether they cover a customized version if one is involved, and what further documentation your market requires. Regulatory claims on supplier listing pages are supplier statements, not verified facts, and they should be checked against the documents provided rather than accepted at face value.
A final practical note: keep the model name in every message. Warranty statements on this site differ by model, specification tables belong to named models only, and a reply that does not name the model cannot be checked against the right document. The inquiry guide phrases every confirmation as something you, the buyer, should ask and check, and the how-to-choose page gives the three-step selection process in full. Together with the product pages, they are the complete buying path this site offers, and no step in that path requires trusting an undocumented figure.
Related pages: How to choose · Inquiry guide · Aesthetic laser equipment