I have received a quote for a spectrometry kit. The kit includes 10+ items, and if I buy the items individually, I may be able to reduce the overall price of the kit. Am I able to ask a question listing the price of each item, in the hope that someone more expert than me knows if the price can be beaten? I believe photo.stackexchange would be a good site to post the question.
That question would not be on topic on any stack exchange site.
Such a question would be "too localized" as well as "not constructive".
It would be too localized because it's specific to one moment in time; the answers will be constantly changing as prices change.
It's not constructive as there's no one answer, you're looking for lots of answers from different vendors. Pretty much any question that requires multiple answers instead of being able to be answered once is "not constructive".
See Q&A is Hard, Let’s Go Shopping! for more information on the topic of shopping questions.