We are going to Europe in December for 5 weeks (we're going to drive from Paris to the southern part of Spain so it shouldn't be too cold) and we are going to lease a Renault for the whole time that we are there. The lease cost is about $2200 or $63/day which is a good price for a fully insured vehicle.
After a search of OB for "travel agent" discount I found the following post from 2014:
Travel Agent Kickbacks - https://www.ozbargain.com.au/node/163012
that indicates that bookings through Autoeurope, who do Renault leasing, may pay the travel agent a commission of 20%.
Do you know of any travel agent (in Perth or online) who will rebate a significant percentage of their commission to me? 50% ($220 off) would be nice but that may be optimistic.
I am planning to book the air tickets online directly with the airline because I don't think there's much "fat" in the price and also there's less chance of something going wrong.
However, is there any reason why I should book through a TA? Previously, if you used Flight Centre's Lowest Airfare Guarantee to price beat a competitor's price they waived credit card fees but this appears to no longer be available.
http://www.flightcentre.com.au/lowest-airfare-guarantee-faqs
Travel agents will often have access to other discount fares, that aren't available on the airline website, eg group rates, sale fares, etc
On the flip side, travel agents can charge what they want to any changes before departure so tread with caution.
I would look at skyscanner for an online travel agent and see if you can find a physical travel agent to match it (if there's a price difference between buying from airline directly)
Check the T&C more closely - I'm sure they'll include a hefty excess/deductible. Further, an agency like autoeurope just passes your booking on to a local supplier (eg hertz, avis, etc). You can't really assess the T&C for the insurance before you pick up the vehicle.
IMO - Get your own insurance.
I would be looking for EUR 20-30/day, without insurance. Possibly a little more for a one-way rental.