Well, the title pretty much says it all.
A Sparmeister (noun), briefly speaking, is
a person who is concerned about his finances and tries to avoid spending money whenever possible.
a person who always tries to get the best (lowest) price on things.
I would consider this word neutral, rather than offensive or complimentary.
The context for which I need this word is gonna be a sentence similar to this:
Looks like you are quite the "Sparmeister", you only spent --insert low amount of money here--.
Is there any better wording for "Sparmeister"?