I presume they charge you for getting a (new) tenant separately as well ? A few years ago I was paying 5% plus VAT for management and 5% plus VAT for getting a tenant for a year. If the tenant stayed they charged something like a €100 to get them to sign for another year. It's all tax deductible.
The Let & Management fee normally includes finding the new tenant (let) and then the subsequent management (manage).
In Limerick I'm paying 8.5% + VAT for Let & Management for the duration of the tenancy. No other marketing costs. Other option was let only at 7% (payable for the first year only). At the time I got two other quotes (8% and 10%). When with this crowd as I had heard good references and liked what I heard/saw. They only focus on let/management and don't do sales like some places in Limerick do.