Ive seen the Bosch AGM G49 for $159.99 online only, with a 15% coupon at pep boys. Advance auto also has a G49 AGM for around $189, but they often have 40% off and $50 off $125 coupons.

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Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (113k)
1991 350SD (206k)
1991 300D (228k)
1993 300SD (291k)
1993 300D 2.5T (338k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (265k)

Past Diesels:
1983 300D (228K)
1985 300D (233K)