Don't worry. Email Scott at www.borton.com for Volvo parts at a discount. Volvo parts are often best and coolant hoses are a case in point. They fit perfectly, last forever and remain soft, so engine vibration does not break the notorious plastic radiator filler neck. If still you do not want to spend the money for Volvo parts even at discounted prices, email Nick at www.fcpgroton.com for good aftermarket hoses at the lowest prices. Tell either Scott or Nick what your car is and that you want to change all coolant hoses, thermostat and so on and they will know what you need. Get also a new heater valve and perhaps a new water pump if it has never been changed on your car. Take hoses off the coolant reservoir and check whether metal inserts at inlet or outlet are rusting and compromising the integrity of the reservoir. If in doubt, change the reservoir. If you have an original plastic radiator, it is probably time to change it, preferably with a new Volvo or OEM (Blackstone?) aluminum and plastic one. Flush the cooling system with a garden hose. Empty. Fill with distilled water and run the car for a bit. Empty. Put in new parts. Fill to half of system capacity (about one gallon) with Volvo C coolant (yes, the expensive one). Top up with distilled water. Every now and then check it, but do not worry about your cooling system for at least five years. Once a year, ground a multimeter to engine and dip positive probe the coolant in the reservoir to check for voltage. If your meter reads more than a couple of tenths of a volt, restore anti corrosion and lubricanting properties of coolant. If you refuse to spend money on Volvo C, Prestone will do, but make sure you check voltage and pour in Prestone anti-corrosion and water pump lubricant treatment once a year or every two years to keep that voltage as close to zero as you can. Otherwise, keep an eye out for Zerex Glysantin coolant.