Kaya Green (asker) Feb 20, 2018:

Thank you for all the very helpful comments and suggestions!
I agree that the Sammel- part is unnecessary in English. However, the client was keen on it so we agreed to use "combined quotation" as the least bad option. The quote does combine a variety of different in-house and potential third-party services and includes optional services, so combined quotation seemed the best fit.
Apologies for not clarifying the context earlier - Sammelangebot is the heading for the whole text rather than part of the text itself.

philgoddard Feb 20, 2018:

Context Is this the word at the top of a document you're translating, or part of a sentence? If it's the latter, what does it say?

Lancashireman Feb 20, 2018:

Angebot Various options for translating this term here:
https://dict.leo.org/englisch-deutsch/angebot
The least natural of all in this context is 'offer'.

Birgit Gläser Feb 20, 2018:

depends on offer contents If you have one price and the offer only lists the comprised services, then I would use Offer or Project Offer or Event Offer if it is an event.

I'd simply use Offer if the various services are listed with individual prices and the client can pick and choose which options he will take...

Even in German the Sammel indicates only that more than one item is offered, but has no bearing on terms or anything...