Clearly I'm too broke to notice a 23 euro sneak fee.

Strawberries before egg festival? They sell at the spring fest, not needed before.

The "convenience tax" part is where I see it differently. You're not just paying for the last 40 minutes of driving, you're paying for someone to be liable for your car from your driveway to the new one, and terminal lots are where damage claims and key mix-ups tend to happen. When I looked into this, the terminal option also meant my car sat for a couple days waiting on a full load, and I needed it the day after I landed. Saving $600 is real, but it only works if your schedule is flexible and you're fine with a little more risk on the handoffs.