At Talend, they like acronyms; for instance they never say Talend Open Studio but instead, TOS. So let's speak about THS. You are welcomed by:

Welcome to Talend Store, the location for the online purchase of all Talend solutions. [...] Select a solution below to view its detail and price.

So, let's have a look:

Technical support, Product Training, Talend for SugarCRM
Ok
Professional Services
Starting from the "Talend Expert Program", no more prices (4 items over 6), not even a quotation overview.
Talend On Demand
You can sign up "for FREE" even with a monthly payment... but without a price, "for FREE".
Talend Integration Suite
You can inquire for product training, which is not in the "Product Training" section of course, but no price at all, neither for the product, nor for the training.

Basically, you can buy being fully informed: technical support, basic training, an extension, and 2 items over 6 for "Professional Services". What you can't buy being fully informed (starting from the price): a way to do teamwork (TOD or TIS is required), that is... to work in a professional way.